Including the ColPack Sparsity Calculations

Purpose
If you specify a colpack_prefix on the cmake command line, the CppAD sparse_jacobian calculations use the ColPack package.

colpack_prefix
If ColPack is installed on your system, you can specify a value for its install colpack_prefix on the cmake command line. The value of colpack_prefix must be such that, for one of the directories dir in cmake_install_includedirs ,       colpack_prefix/dir/ColPack/ColPackHeaders.h  is a valid way to reference to the include file ColPackHeaders.h.

The ColPack header files has a       using namespace std  at the global level. For this reason, CppAD does not include these files. It is therefore necessary to link the object library cppad_lib when using ColPack.
If you are using Unix, you can download and install a copy of ColPack using get_colpack.sh . The corresponding colpack_prefix would be build/prefix.